all: add support for alias bool assign operators

doc/docs.md

@@ -7731,4 +7731,5 @@ Assignment Operators
 +=   -=   *=   /=   %=
 &=   |=   ^=
 >>=  <<=  >>>=
+&&= ||=
 ```

vlib/v/checker/infix.v

@@ -759,10 +759,10 @@ fn (mut c Checker) infix_expr(mut node ast.InfixExpr) ast.Type {
 		}
 		.and, .logical_or {
 			if !c.pref.translated && !c.file.is_translated {
-				if node.left_type != ast.bool_type_idx {
+				if left_final_sym.kind != .bool {
 					c.error('left operand for `${node.op}` is not a boolean', node.left.pos())
 				}
-				if node.right_type != ast.bool_type_idx {
+				if right_final_sym.kind != .bool {
 					c.error('right operand for `${node.op}` is not a boolean', node.right.pos())
 				}
 			}

vlib/v/gen/c/assign.v

@@ -535,8 +535,9 @@ fn (mut g Gen) assign_stmt(node_ ast.AssignStmt) {
 					op_overloaded = true
 				}
 			}
-
-			if left_sym.kind == .bool && right_sym.kind == .bool
+			final_left_sym := g.table.final_sym(g.unwrap_generic(var_type))
+			final_right_sym := g.table.final_sym(unwrapped_val_type)
+			if final_left_sym.kind == .bool && final_right_sym.kind == .bool
 				&& node.op in [.boolean_or_assign, .boolean_and_assign] {
 				extracted_op := match node.op {
 					.boolean_or_assign {

vlib/v/tests/bool_assign_operator_test.v

@@ -6,3 +6,17 @@ fn test_bool_assign_operator() {
 	flag &&= false
 	assert flag == false
 }
+
+type Bool = bool
+
+fn test_alias_bool_assign_operator() {
+	mut flag := Bool(true)
+	flag = flag || false
+	assert flag == true
+
+	flag ||= false
+	assert flag == true
+
+	flag &&= false
+	assert flag == false
+}